WPF InkCanvas基本操作方法详解

<Window x:Class=\"WPF_InkCanvas.MainWindow\"
     ns=\"http://schemas.microsoft.com/winfx/2006/xaml/presentation\"
     ns:x=\"http://schemas.microsoft.com/winfx/2006/xaml\"
     ns:d=\"http://schemas.microsoft.com/ /blend/2008\"
     ns:mc=\"http://schemas.open formats.org/markup-compatibility/2006\"
     ns:local=\"clr-namespace:WPF_InkCanvas\"
    mc:Ignorable=\"d\"
     =\"MainWindow\" Height=\"450\" Width=\"800\">
  <Grid>
    <Grid.RowDefinitions>
      <RowDefinition/>
      <RowDefinition Height=\"auto\"/>
      <RowDefinition Height=\"auto\"/>
    </Grid.RowDefinitions>
    <Image Name=\"imgMeasure\" HorizontalAlignment=\"Center\" Stretch=\"Uniform\"/>
    <InkCanvas Name=\"inkCanvasMeasure\" EditingMode=\"None\" Background=\"Transparent\" HorizontalAlignment=\"Center\" 
          Width=\"{Binding ElementName=imgMeasure, Path=ActualWidth}\" Height=\"{Binding ElementName=imgMeasure, Path=ActualHeight}\"
          >
      <!--MouseDown=\"InkCanvasMeasure_MouseDown\" MouseMove=\"InkCanvasMeasure_MouseMove\"-->
      <Label Content=\"{Binding MeaInfo}\" Background=\"Transparent\" HorizontalAlignment=\"Left\" VerticalAlignment=\"Top\" Margin=\"10\" 
          FontSize=\"18\" Foreground=\"Red\" IsHitTestVisible=\"False\"/>
    </InkCanvas>
    <Grid Grid.Row=\"1\">
      <Grid.ColumnDefinitions>
        <ColumnDefinition/>
        <ColumnDefinition/>
        <ColumnDefinition/>
        <ColumnDefinition/>
        <ColumnDefinition/>
      </Grid.ColumnDefinitions>
      <RadioButton Grid.Column=\"0\" Content=\"绘制墨迹\" Click=\"RadioButton_Click\"/>
      <RadioButton Grid.Column=\"1\" Content=\"按点擦除\" Click=\"RadioButton_Click\"/>
      <RadioButton Grid.Column=\"2\" Content=\"按线擦除\" Click=\"RadioButton_Click\"/>
      <RadioButton Grid.Column=\"3\" Content=\"选中墨迹\" Click=\"RadioButton_Click\"/>
      <RadioButton Grid.Column=\"4\" Content=\"停止操作\" Click=\"RadioButton_Click\"/>
    </Grid>
    <StackPanel Grid.Row=\"2\" Orientation=\"Horizontal\">
      <Button Content=\"OpenFile\" Margin=\"5\" HorizontalAlignment=\"Left\" FontSize=\"20\" Click=\"OpenFile_Click\"/>
      <Button Content=\"SaveInkCanvas\" Margin=\"5\" HorizontalAlignment=\"Left\" FontSize=\"20\" Click=\"SaveInkCanvas_Click\"/>
      <Button Content=\"LoadInkCanvas\" Margin=\"5\" HorizontalAlignment=\"Left\" FontSize=\"20\" Click=\"LoadInkCanvas_Click\"/>
      <Button Content=\"CopyInkCanvas\" Margin=\"5\" HorizontalAlignment=\"Left\" FontSize=\"20\" Click=\"CopyInkCanvas_Click\"/>
      <Button Content=\"PasteInkCanvas\" Margin=\"5\" HorizontalAlignment=\"Left\" FontSize=\"20\" Click=\"PasteInkCanvas_Click\"/>
    </StackPanel>
  </Grid>
</Window>

using Microsoft.Win32;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
 
namespace WPF_InkCanvas
{
  /// <summary>
  /// MainWindow.xaml 的交互逻辑
  /// </summary>
  public partial class MainWindow : Window
  {
    ViewModel viewModel;
    public MainWindow()
    {
      InitializeComponent();
 
      DrawingAttributes drawingAttributes = new DrawingAttributes
      {
        Color = Colors.Red,
        Width = 2,
        Height = 2,
        StylusTip = StylusTip.Rectangle,
        FitToCurve = true,
        IsHighlighter = false,
        IgnorePressure = true,
 
      };
      inkCanvasMeasure.DefaultDrawingAttributes = drawingAttributes;
 
      viewModel = new ViewModel
      {
        MeaInfo = \"测试······\",
      };
 
      DataContext = viewModel;
    }
 
    private void InkCanvasMeasure_MouseDown(  sender, MouseButtonEventArgs e)
    {
 
    }
 
    private void InkCanvasMeasure_MouseMove(  sender, MouseEventArgs e)
    {
 
    }
 
    private void OpenFile_Click(  sender, RoutedEventArgs e)
    {
      OpenFileDialog openDialog = new OpenFileDialog
      {
        Filter = \"Image Files (*.jpg)|*.jpg|Image Files (*.png)|*.png|Image Files (*.bmp)|*.bmp\",
          = \"Open Image File\"
      };
      if (openDialog.ShowDialog() == true)
      {
        BitmapImage image = new BitmapImage();
        image.BeginInit();
        image.UriSource = new Uri(openDialog.FileName, UriKind.RelativeOrAbsolute);
        image.EndInit();
        imgMeasure.Source = image;
      }
    }
 
    private void RadioButton_Click(  sender, RoutedEventArgs e)
    {
      if ((sender as RadioButton).Content.ToString() == \"绘制墨迹\")
      {
        inkCanvasMeasure.EditingMode = InkCanvasEditingMode.Ink;
      }
 
      else if ((sender as RadioButton).Content.ToString() == \"按点擦除\")
      {
        inkCanvasMeasure.EditingMode = InkCanvasEditingMode.EraseByPoint;
      }
 
      else if ((sender as RadioButton).Content.ToString() == \"按线擦除\")
      {
        inkCanvasMeasure.EditingMode = InkCanvasEditingMode.EraseByStroke;
      }
 
      else if ((sender as RadioButton).Content.ToString() == \"选中墨迹\")
      {
        inkCanvasMeasure.EditingMode = InkCanvasEditingMode.Select;
      }
 
      else if ((sender as RadioButton).Content.ToString() == \"停止操作\")
      {
        inkCanvasMeasure.EditingMode = InkCanvasEditingMode.None;
      }
    }
 
    private void SaveInkCanvas_Click(  sender, RoutedEventArgs e)
    {
      FileStream fileStream = new FileStream(\"inkCanvas.isf\", FileMode.Create, FileAccess.ReadWrite);
      inkCanvasMeasure.Strokes.Save(fileStream);
      fileStream.Close();
    }
 
    private void LoadInkCanvas_Click(  sender, RoutedEventArgs e)
    {
      FileStream fileStream = new FileStream(\"inkCanvas.isf\", FileMode.Open, FileAccess.Read);
      inkCanvasMeasure.Strokes = new StrokeCollection(fileStream);
      fileStream.Close();
    }
 
    private void CopyInkCanvas_Click(  sender, RoutedEventArgs e)
    {
      inkCanvasMeasure.CopySelection();
    }
    private void PasteInkCanvas_Click(  sender, RoutedEventArgs e)
    {
      inkCanvasMeasure.Paste();
    }
  }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
 
namespace WPF_InkCanvas
{
  class ViewModel : INotifyPropertyChanged
  {
    public event PropertyChangedEventHandler PropertyChanged;
 
    protected virtual void  d(string propertyName = null)
    {
      if (PropertyChanged != null)
        PropertyChanged.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
 
    private string meaInfo;
    public string MeaInfo
    {
      get => meaInfo;
      set
      {
        meaInfo = value;
         d(\"MeaInfo\");
      }
    }
  }
}